In the last century many researchers have tried to discover the secrets involved in the function of the brain. While the old view about the brain operations was based on the principle of mass action, using the new techniques for example using the functional neuroimaging experiments, it has been shown that the structure and the function of the brain are correlated together. Modern neuroimaging techniques demonstrate that there is substantial localization of many functions in the neural tissue of the brain. Recent technological advances have expanded the role of magnetic resonance imaging to include mapping the brain’s dynamic function, so that it can be used for basic researches and clinical applications.